Pump.



PATENTBD JULY 10, 1906.

F. W. MA'UHLBT.

PUMP. v APPLICATION FILED MAB-30, 1805.

WITNESSES:

No. 825,671. PATBNTED JULY 10, 1906.

PUMP.

APPLICATION nun MALBO, 1906.

a sums-sum 2.

ATTORIVE PATENTED' JULY 10, 1906.

P. W. MAGHLBT. PUMP.

APPLICATION FILED MAR. a0, 1905.

3 SHEETS-SHEET 3.

WITNESSES:

- the vane or vanes from the cylin TED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented July 10, 1906.

Application filed March 80, 1905. Serial No. 252.845.

To all whom it may concern:

Be it known that I, Fiu'iz W. MAOHLET, a citizen of the United States,residin in Elizabeth, in the county of Union an State of New Jersey,have invented certain new and useful Im rovements in Pumps, &c., ofwhich the ollowing is a specification.

This invention relates to rotary pumps, blowers, engines, &c., in'whicha revolving cylinder is mounted eccentrically in a drum and is providedwith vanes or pistons, which slide into and out of the cylinder duringits revolution.

In the pum or engine illustrated herein there is provi ed acylindraceous drum, in whichis mounted eccentrically to the drum acylinder having a pair of vanes or pistons adapted to roject alternatelyfrom op osite sides'of said cylinder during each revo ution thereof. Astud projects inwardly from the vertical wall of the drum in such amanner as to control positively all the movements of the vanesrelatively to said eccentric c linder, said stud engaging ahub or shoeprovidhd upon the vanes an having a slot which is perpendicular*to theplane of the vanes and which receives said stud. The facewise orrevolving movements of the vanes are controlled by said eccentriccylinder, while the radial movements of the vanes relatively to saidcylinder,

or in and out thereof, are controlled by the slotted hub acting incooperation with said stud. The inner periphery of the drum is notdepended upon to force the vanes inwardly, nor is it necessary todependupon sprin s for forcing the vanes outwardl the radia positionsvof the vanes being awa "s positively controlled by means within thecylinder and positively connected to the drum. The tips of the vanes mayrun in light contact or out of contact with the inner periphery of thedrum, thus minimizing or avoiding friction at these oints. The two vanesbein in the form 0 a single plateor being ri 'd y connected serve eachas hearing or t e otherthat is to say, the vaneplate extends clearthrough the cylinder, and sliding bearings, therefore, are provided onlyat the periphery of the cylinder, and hence the length of the bearing isequal to the diameter of the cylinder. The (projection of ermayhence Ibe extraordinary in pro ortion to the diameter of the cylinder, an themachine is rendered exceedv'virlilgly powerful and eflicient for itssize. It be understood that because .by their tips is not cylindrical.

'the other of said vanes being shown drawn into said cylinder.

inder the late may slide eely, notwithstanding tl ie pressure of fluidto which the face of the projecting vane is subjected. The vanes beingmade in one piece or rigid with each other, it follows that the curvedescribed Still the parts ma be so proportioned that the curve describedthe vanes is approximately cylindrical, and the drum may readily beshaped to conform to such curve.

The object of my invention is to construct a machine of this class whichis highly eflicient for its size, to enable the machineto'lie' 'runathigh speed safely and effectively,-'and generally to produce at low costa sim 10 type of an engine. which shall consist of a ew parts, readilyand cheaply made, assembled and, disassembled, highly durable, and notliable to get out of order.

Other objects and advantages will hereinafter appear. In theaccompanying drawings,Figure 1 is a transverse sectional view of apump:blower, or engine made in accordance wit my invention, one of the vanesbeing shown fully projected from the eccentric cylinder and Fig. 2 is adiagram illustrating different positions assumed by the vanes during asin le revolution of the engine. -Fig. 3 is a ongitudinal centralsectional view of the engine. the eccentric cylinder, showin theslideway therein for the vane-plate. ig. 5 is a pers ective view of-a.slotted hub or shoe emp oyed for controlling the radial positions of thevanes. Fig. 6 is a perspective view of a pair of vanes made in onepiece. Fig. 7 illustratesthe preferred construction 0 slotted hub orshoe and also shows roller-bearings for receiving the facewise thrust ofthe vanes or plates that slide in and out of the'eccentric cylinder.Figs 8 is a view of the preferred means of constructing and mounting theeccentric cylinder the same being shown journaled at both ends to insuresteady running and conduce to durability, this form be-. ing especialldesirable for pure s, blowers,- or engines 0 large dimensions. ig. 9illustrates another method of mounting the inner end of the eccentriccylinder.

The drum 1 of the blower or engine is provided with an inlet 2 and anoutlet 2. Between said inlet and outlet is mounted'a revoluble cylinder3, eccentric to the drum and i of the ample depth of bearin within thecyl- I Fig. 4 is a view of servin as a partial partition between theinlet an Outlet. Upon its under side it runs in contact with a saddle orother abutment 4, so that movement of fluid between the inlet and outletcan occur only over the to of the cylinder, the latter extending the fullength of the drum and fitting closely between the a portion 1 1 of saidplate is drawn into the cylplate.

inder, said portions Qand 11 constituting op- 1posite pistons or vanes,which, however, may e otherwise connected than by forming them in onepiece.- Said plate of course extends fFrom wall 5, to wall 6 of thedrum, as seen at The-plate is formed with a central rectanlar recess 12,the opposite edges of which ts into mortises 13, formed radially inopposite sides 'of a hub or shoe 14, the construction being such thatthe hub may be readily slipped onto and off from the late. Means may beprovided for boltin t e hub to the The function of the 11b is to controlthe endw ise radial position of the vanes, and to this end it isprovided with a slot 15, which isperpendicular to the plane of thevanes,,as seen clearly at Fig. 1, and extends upon op posite s ides ofsaid vanes-#that is, saidslot is continuous through the recess 12 in theplate 9 11. In engagement with this slot is a stationary stud 16,projecting inwardl from the vertical wall 6 of the drum and pre 'erablysecured by a set-screw 17 in a boss 18-,

formed upon the drum-wall; An antifricti-on-roller' 19 or any othersuitable device may be provided between the stud 16 and the member 14.The stud may be provided with a longitudinal feed-opening 20,terminating at said roller, for oil or other lubricant, as seen at Fig.3. The c linder 3 has a hub 21',

. mountedupo-n a sha t 22, provided with a fl-y-wheel 23, said huboccupying a cup-like depression or recess 21, formed in the head 5.

As the cylinder 3 rotates the vanes 9 11 are carried facewise thereby,While owing to the engagement of the roller-stud 16 with the slotte 9'11 are always equidistant from the said stud 16. When the cylinder makesa quarter-turn from the Fig. 1 position, the vanes 9' 11 are depressedto a level with theaxis 22' of said cylinder, as seen at A, Fig. 2; butthe slot 15- is of sufiicient length to enga e the roller-stud 16 at alltimes. As the cy inder rotates the vanes move radially in and outrelatively thereto, as may be seen at Fig. 2, the radial itions of thevanesrelatively to the c er.-bein always positively controlle by saidstu" independentl of the inner periphery of the drum 1. he axis or hubor shoe 14 the tips of the vanes stud 16 is about central of the drum 1but the latter is cylindraceous,-being shaped to conform to the pathdescribed by the ti s of the vanes 9 11, which path deviates slightlyfrom true circular form.

It will be seen that a very deep bearing for the vane-plate 9 11 isprovided, said bearing being about equal in depth to the diameter of theeccentric cylinder 3, and hence binding and undue wear and leakage areavoided. At the same time it ispracticable for each vane to pro'ect atan extraordinary extent from the cyiinder, as seen at Fig. 1, inproportion to the diameter in the latter, the result being that amachine is produced of very great power or efiiciency in proportion toits size and cost of construction and operation. The tips of the vanes 911 may clear the inner periphery 10 of the drum by a few thousandths ofan inch, so that friction at this point posed may be cheaply made andreadily assembled and disassembled and may run at unusually high s eed,owing to the minimizing of friction, while at each revolution there is again in the amount of work done, owing to the proportionall largepressure area or projecting portion 0 he vane.

At Fi 9 the inner vertical wall 6 of the drum is ormed with a bearing24, uponwhich rotates a lar e hub 25, formed uponthis end of the cyliner 3, said hub being hollow or open at its end and of sufficientinternal diameter to clear a stud-supporting boss 18 within the drum andformin a continuation of the boss 18. Thus the cyhnder is su ported atboth ends, this being a desirabe feature, especially in large sizes ofblowers or engines.

At Fig. 8 the stud 16 is fixed upon a radial arm 26', the latter carriedby a shaft 27, fixed upon a set-screw 28 in hub 18. The shaft 27 isconcentric with the shaft 22 of the cylin- IIC der' 3, and the latterhas a head 29, secured by screws 30 and provided with a hub 31 to turnupon the inner end of said fixed shaft 27'. Said head 29 incloses saidarm 26 and is provided with a recess 3-2 to receive the latter.

At Fig. 7 another form of hub or shoe for the vane-plate is shown, andit is substantially the same as that at Fig. 5 exce t that superfluousmetal is cut away. This ibrm of 1111- or shoe comprises a mainplate-like member 33, having a pair of flanges 34, which form the wallsof the slot 15. Said flanges are formed with angled members 35, havingmortises 13 to receive the edges of the vane-plate -9 11. Ribs 36 extendfrom the flan es 34' to the angled members 35 to stiffen t e shoe,which, it will be seen, is very light and strong.

At Fig. 7 the direction of the thrust or fluid .pressure upon the facesof the vanes is indi- 13o cated by arrows, audit will be seen that saidthrust is .taken by roller-bearings consisting of cylinders 37, mountedupon rolls 38, the latter running upon shafts 39, extendinglongitudinally of the cylinder. Slight clearances 40 are formed in theslots 7 8 in the cylinder upon the sides adjoining the rollerbearings,so that the pressure of the vanes may be taken by rollers and not by thewall of the slots. This provision of roller-bearings enables themovement of the plate relatively to the cylinder to be almost withoutfriction. This not only increases the power and reduces wear, but alsoenables the ma chine to run atconsiderably higher s eed than if therollers were omitted, particu arly in the case of large blowers. Theshafts 39 each extend from end of the cylinder and are detachablymounted in opposite slots or bearings 41, formed in the ends of thecylinder. Opposing cylinders 37 may also be provided for the vanes, sothat the pump may run either forwardly or backwardly.

Variations may be resorted to within the scope of my invention, andportions of my improvements may be used without others.

Having thus described my invention, I claim 1. A pump or enginecomprising a c lindraceous drum provided with heads and aving an inletand an outlet, a cylinder having a head and revoluble within said drumand eccentric thereto and fitting closely between the heads thereof andmounted between said inlet and outlet, said cylinder having oppositeradial slots in its periphery and in its head, vane's or pistons rigidwith each other and mounted to slide in said slots in and out ofopposite sides of the periphery of said cylinder, a guiding-shoe fixedto said vanes Within said cylinder and having a slot transverse to theplane of said vanes, and a stationary hearing eccentric to said cylinderand within the slot of said shoe, said drum shaped to conform to thecurve described by said vanes; the side edges of said vanes flush withthe exterior surfaces of the ends of said cylinder and fitting closelybetween said drumheads' one of the latter having a depression, and saidcylinder-head having a hub portion occupying said depression.

2. A pump or engine com rising a cylindraceous drum provided with eadsand having an inlet and anoutlet, a cylinder revoluble within said drumand eccentric thereto and mounted between said inlet and outlet, a pairof vanes mounted to slide radially in and out of op osite sides of said0 linder, a guiding-shoe ixed to said vanes within said cylinder andhaving a slot vertical to the plane of said vanes, and a stationary studor bearing member eccentric to said cylinder and extendin within saidslot; said drum shaped to coniorm to the curve described by said Yvanes, both said vanes and the ends of said i cylinder fittin closelybetween said drumheads; said cy inder havin peripheral slots each openat both ends of the cylinder to receive said vanes and the latterprojecting about equally at each end from said shoe.

3. A pump or engine comprising a cylindraceous drum provided with headsand having an inlet and an outlet, a cylinder having a pair of heads andrevoluble within said drum and eccentric thereto and mounted betweensaid inlet and outlet,.the heads of said cylindrum, one of saidcylinder-heads provided with a hub of relatively small diameter, a headof said drum recessed to receive said hub, a pair of connected vanesmounted to slide in and out of the periphery-of said cylinder, radialslots for said vanes in both the periphery and the heads ofsaidcylinder, a uiding-shoe fixed to said vanes within said ead and having aslot transverse to the plane of said vanes, and a stationary bearingmember eccentric to said cylinder and extending within said slot; saiddrum shaped to conform to the curve described by said vanes, and theside ed es of said vanes flush with the exterior su aces of the heads ofsaid cylinder and fittin closely between said drumheads; the drum ead oposite said hub being centrally recessed to c ear said eccentricstationary bearing-member.

4. A pum or engine comprising a drum having an in st and an outlet, acylinder revoluble Within said drum and eccentric thereto andmountedbetween said inlet and outlet, vanes rigid with each other and mountedto slide in and out of opposite sides of the periphery of said cylinder,a guiding-shoe fixed to said vanes within said cylinder and having aslot transverse to the plane of said vanes, an inwardly-extending studengaging said slot about centrally of said drum, a supportingarm rigidwith said stud, and a s'haftcarrying said arm and rigid therewith andfixed in said drum concentrically with said cylinder, the latter havinga bearing upon said fixed shaft outside of said-arm.

having an inlet and an outlet, a cylinder revoluble within said drum andeccentric thereto vanes in the form of a single plate and mounted toslide in and out of opposite sides of the periphery of said cylinder, aguiding-shoe fixed to said vanes within said cylinder and having a slotperpendicular to the plane of said plate, an inwardly-extending studengaging said slot about centrally of said drum, a supporting-arm rigidwith said stud, a shaft carrying said arm and rigid therewith and fixedin said drum concentrlcally with said cylinder, and a head secured tothe end ofsaid cylinder and having a hub j ournaled on said fixed derfitting closely between the heads of said 5. A pump or engine comprisinga drum and mounted between said inlet and outlet,

shaft, and also having a recess to receive said arm; said drum shaped toconform to the curve described by the tips of said vanes.

6. A pump or engine comprising a cylindraceous drum having end walls andalso having an inlet and an outlet, a hollow cylinder revoluble [withinsaid drum and eccentric thereto and mounted between said inlet andoutlet, ahub for said cylinder, one ofsaid end walls having a recess toreceive said hub, and the face of the latter being flush with saidendwall, a shaft fixed to said hub, a pair of vanes in the form of asingle rectangular plate fitting in said drum and mounted to slideradially in and out of opposite sides of said cylinder, the latterhaving openings extending from end to end and from side to side toreceive said plate, and having peripheral bearings for said plate, thelatter having a central recess in one side edge, a shoe havlng slotsWhich fit upon the opposite edges of said plate at said recess, saidshoe also having withinsaidrecess a slot perpendicular to the plane ofthe plate and extending upon opposite sides thereof, and a studprojecting inwardly from the other end wall of said drum about centrallythereof and having means to engage said perpendicular slot; said drumshaped to conform to the curve described by the tips of said plate.

7. A pump or engine comprising a cylindraceous drum having an inlet andan outlet,

a cylinder revoluble Within said drum and eccentric thereto and mountedbetween said inlet and outlet, a vane-plate carried by said cylinder andmounted to slide diametrically thereof and having a central recess inone side edge a hub or shoe upon said plate and having within saidrecess a slot perpendicular to the plate and extending upon oppositesides thereof, and a stationary bearing projecting inwardly from thewall of said drum about centrally thereof and engaging said slot; said 7drum shaped to conform to the curve described by the tips of said plateand said hub or. shoe comprising a main plate-like member having a pairof flanges which form the walls of said 'slot, said flanges formed withangle members having mortises to receive the edges of said vane-plate atsaid recess.

' FRITZ W. MACHLET Witnesses:

GEORGE MAoHLE'r, PHILIP C. OSTERMAN.

